package com.itheima.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.common.R;
import com.itheima.dto.DishDto;
import com.itheima.entity.Category;
import com.itheima.entity.Dish;
import com.itheima.entity.DishFlavor;
import com.itheima.entity.Employee;
import com.itheima.service.CategoryService;
import com.itheima.service.DishFlavorService;
import com.itheima.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Delete;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import javax.naming.Name;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */

@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        //清理所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);
        //清理某个分类下面的菜品缓存数据
        String key = "dish_"+dishDto.getCategoryId()+"_1";  //dish_123123123_1
        redisTemplate.delete(key);
        return  R.success("新增菜品成功");
    }

/**
 * 菜品信息分页查询
 * @param page
 * @param pageSize
 * @param name
 * @return
 */

    @GetMapping("/page")
    public R<Page> page(int page , int pageSize , String name){
        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto>dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();

        List<DishDto>list = records.stream().map((item)->{
            DishDto dishDto = new DishDto();

            Long categoryId = item.getCategoryId(); //分类ID
            Category category = categoryService.getById(categoryId); //拿到分类对象
            if(category != null){
                String categoryName = category.getName();//拿到分类名称
                dishDto.setCategoryName(categoryName);//因为是自己new出来的 只SETcategoryName的话 其余的其他属性都还是空的
            }
            //所以把遍历的item里面的其他属性都COPY到dishdto里面
            BeanUtils.copyProperties(item,dishDto);

            return  dishDto;

        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto byIdWithFlavor = dishService.getByIdWithFlavor(id);

        return R.success(byIdWithFlavor);

    }


    /**
     * 修改菜品
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        //清理所有菜品的缓存数据
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);
        //清理当前添加菜品分类下的缓存
//        String key = "dish_"+dishDto.getCategoryId()+"_1";
//        redisTemplate.delete(key);
        return  R.success("修改菜品成功");
    }

    /**
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     */

    @GetMapping("/list")
    public R<List<DishDto>>list(Dish dish){
        List<DishDto>dishDtos = null;
        //动态构造key
        String key = "dish_"+dish.getCategoryId()+"_"+dish.getStatus();
        //先从redis中获取缓存数据
        dishDtos = (List<DishDto>) redisTemplate.opsForValue().get(key);
        //如果存在，直接返回，无需查询数据库
        if(dishDtos != null){
            return R.success(dishDtos);
        }

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);

        dishDtos = list.stream().map((item)->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);
            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> queryWrapper1 = new LambdaQueryWrapper<>();
            queryWrapper1.eq(DishFlavor::getDishId,dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(queryWrapper1);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());
        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtos,60, TimeUnit.MINUTES);
        return R.success(dishDtos);
    }
/*批量删除，起售停售*/
    //http://localhost:8080/backend/index.html
//请求 URL: http://localhost:8080/category/list?type=1
    //请求 URL: http://localhost:8080/dish/status/0?ids=1468198023715639297
    @DeleteMapping
    public R<String>delete(@RequestParam List<Long>ids){
        log.info("ids:{}",ids);
        dishService.removeByIds(ids);
        return R.success("菜品删除成功");
    }



@PostMapping("/status/{status}")
    public R<String> status(@PathVariable Integer status, @RequestParam List<Long> ids){
    LambdaUpdateWrapper<Dish> wrapper = new LambdaUpdateWrapper<>();
    wrapper.in(Dish::getId,ids);
    wrapper.set(Dish::getStatus,status);
    dishService.update(wrapper);
    return R.success("修改状态成功");
}

}
